import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner num = new Scanner(System.in);
        int dis = num.nextInt();
        double time1 = dis/1.0;
        double time2 = dis/10.0+10;
        if(time1 > time2){
            System.out.println("v");
        } else if (time1 <time2) {
            System.out.println("w");
        }
    }
}
